How to use the Caching component in ASP.NET Core
In this article Xiaobian introduces in detail "how to use Caching components in ASP.NET Core", the content is detailed, the steps are clear, and the details are handled properly. I hope this article "how to use Caching components in ASP.NET Core" can help you solve your doubts.
Components of Caching are provided in the .NET Core. Currently, the Caching component provides three storage methods:
Memory
Redis
SQLSever
1.Memeor Caching
Create a new ASP.NET Core Web application project and install Microsoft.Extensions.Caching.Memory.
Modify ConfigureServices method
Services.AddMemoryCache (); services.AddMvc (). SetCompatibilityVersion (CompatibilityVersion.Version_2_1)
In HomeController, use:
Private IMemoryCache memoryCache; public HomeController (IMemoryCache _ memoryCache) {memoryCache = _ memoryCache;} public IActionResult Index () {string cacheKey = "key"; string result; if (! memoryCache.TryGetValue (cacheKey, out result)) {result = $"LineZero {DateTime.Now}" MemoryCache.Set (cacheKey, result); / / set relative expiration time memoryCache.Set (cacheKey, result, new MemoryCacheEntryOptions () .SetSlidingExpiration (TimeSpan.FromSeconds (10) / / set absolute expiration time memoryCache.Set (cacheKey, result, new MemoryCacheEntryOptions () .SetAbsoluteExpiration (TimeSpan.FromSeconds (10); / / delete cache memoryCache.Remove (cacheKey) / / set cache priority (when the program is under pressure, it will be automatically reclaimed according to priority) memoryCache.Set (cacheKey,result,new MemoryCacheEntryOptions () .SetPriority (CacheItemPriority.NeverRemove)) / / cache callback memoryCache.Set (cacheKey, result, new MemoryCacheEntryOptions () .SetAbsoluteExpiration (TimeSpan.FromSeconds (60)) .RegisterPostEvictionCallback ((key, value, reason, substate) = > {nlog.Warn ($"key {key} value {value} change) upon expiration Because {reason} ") })); / / when Token expires, the cache callback var cts = new CancellationTokenSource () MemoryCache.Set (cacheKey, result, new MemoryCacheEntryOptions () .AddExpirationToken (new CancellationChangeToken (cts.Token)) .RegisterPostEvictionCallback ((key, value, reason, substate) = > {nlog.Warn ($"key {key} value {value} changes because {reason}") }));} ViewBag.Cache = result; return View ();} 2.Distributed Cache Tag Helper
There is a Distributed Cache Tag Helper in ASP.NET Core MVC that is dependent on the MemoryCache component.
You can add a distributed-cache tag directly to the attempt
@ {ViewData ["Title"] = "Home Page";}
Cache items expire in 10 seconds (expires-after absolute expiration time)
Relative ten seconds (relative expiration time of expires-sliding)
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